Patents by Inventor Maheswaran Surendra

Maheswaran Surendra has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20050164468
    Abstract: A first aspect of the present invention is a method of forming an isolation structure including: (a) providing a semiconductor substrate; (b) forming a buried N-doped region in the substrate; (c) forming a vertical trench in the substrate, the trench extending into the N-doped region; (d) removing the N-doped region to form a lateral trench communicating with and extending perpendicular to the vertical trench; and (e) at least partially filling the lateral trench and filling the vertical trench with one or more insulating materials.
    Type: Application
    Filed: March 17, 2005
    Publication date: July 28, 2005
    Inventors: An Steegen, Maheswaran Surendra, Hsing-Jen Wann, Ying Zhang, Franz Zach, Robert Wong
  • Publication number: 20050086645
    Abstract: Techniques are provided for generically controlling one or more resources associated with at least one computing system. In one aspect of the invention, the technique comprises evaluating one or more performance metrics associated with the one or more resources given one or more configurations of the one or more resources. The technique then causes a change in the one or more configurations of the one or more resources based on the performance metric evaluating step. The one or more performance metrics and the one or more configurations are expressed in generic formats.
    Type: Application
    Filed: October 17, 2003
    Publication date: April 21, 2005
    Applicant: International Business Machines Corporation
    Inventors: Yixin Diao, Frank Eskesen, Steven Froehlich, Joseph Hellerstein, Alexander Keller, Lisa Spainhower, Maheswaran Surendra
  • Publication number: 20050062165
    Abstract: A method to form a closed air gap interconnect structure is described. A starting structure made of regions of a permanent support dielectric under the interconnect lines and surrounding interconnect vias with one or more sacrificial dielectrics present in the remaining portions of the interconnect structure, is capped with a dielectric barrier which is perforated using a stencil with a regular array of holes. The sacrificial dielectrics are then extracted through the holes in the dielectric barrier layer such that the interconnect lines are substantially surrounded by air except for the regions of the support dielectric under the lines. The holes in the cap layer are closed off by depositing a second barrier dielectric so that a closed air gap is formed. Several embodiments of this method and the resulting structures are described.
    Type: Application
    Filed: September 19, 2003
    Publication date: March 24, 2005
    Inventors: Katherine Saenger, Maheswaran Surendra, Simon Karecki, Satya Nitta, Sampath Purushothaman, Matthew Colburn, Timothy Dalton, Elbert Huang
  • Patent number: 6869899
    Abstract: The invention relates generally to lithographic patterning of very small features. In particular, the invention relates generally to patterning of semiconductor circuit features smaller than lithographically defined using either conventional optical lithography or next generation lithography techniques. The invention relates more particularly, but not by way of limitation, to lateral trimming of photoresist images.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 22, 2005
    Assignee: International Business Machines Corporation
    Inventors: Arpan P. Mahorowala, Maheswaran Surendra, Jung H. Yoon, Ying Zhang
  • Patent number: 6864041
    Abstract: A method of fabricating an electronic chip on a wafer in which a first mask at a predetermined lower resolution is developed on the wafer and then etched under a first set of conditions for a predetermined period to achieve a mask that is below the resolution limit of current lithography. The etched mask is then used as a hard mask for etching material on a lower layer.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: March 8, 2005
    Assignee: International Business Machines Corporation
    Inventors: Jeffrey J. Brown, Sadanand Vinayak Deshpande, David V. Horak, Maheswaran Surendra, Len Y. Tsou, Qingyun Yang, Chienfan Yu, Ying Zhang
  • Publication number: 20040262695
    Abstract: A first aspect of the present invention is a method of forming an isolation structure including: (a) providing a semiconductor substrate; (b) forming a buried N-doped region in the substrate; (c) forming a vertical trench in the substrate, the trench extending into the N-doped region; (d) removing the N-doped region to form a lateral trench communicating with and extending perpendicular to the vertical trench; and (e) at least partially filling the lateral trench and filling the vertical trench with one or more insulating materials.
    Type: Application
    Filed: June 26, 2003
    Publication date: December 30, 2004
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: An L. Steegan, Maheswaran Surendra, Hsing-Jen Wann, Ying Zhang, Franz Zach, Robert Wong
  • Publication number: 20040181370
    Abstract: Techniques for performing adaptive and robust prediction. Prediction techniques are adaptive in that they use a minimal amount of historical data to make predictions, the amount of data being selectable. The techniques are able to learn quickly about changes in the workload traffic pattern and make predictions, based on such learning, that are useful for proactive response to workload changes. To counter the increased variability in the prediction as a result of using minimal history, robustness is improved by checking model stability at every time interval and revising the model structure as needed to meet designated stability criteria. Furthermore, the short term prediction techniques can be used in conjunction with a long term forecaster.
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Applicant: International Business Machines Corporation
    Inventors: Steven E. Froehlich, Joseph L. Hellerstein, Edwin Richie Lassettre, Todd William Mummert, Maheswaran Surendra
  • Publication number: 20040181794
    Abstract: Automated or autonomic techniques for managing deployment of one or more resources in a computing environment based on varying workload levels. The automated techniques may comprise predicting a future workload level based on data associated with the computing environment. Then, an estimation is performed to determine whether a current resource deployment is insufficient, sufficient, or overly sufficient to satisfy the future workload level. Then, one or more actions are caused to be taken when the current resource deployment is estimated to be insufficient or overly sufficient to satisfy the future workload level. Actions may comprise resource provisioning, resource tuning and/or admission control.
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Applicant: International Business Machines Corporation
    Inventors: David Wiley Coleman, Steven E. Froehlich, Joseph L. Hellerstein, Lawrence S. Hsiung, Edwin Richie Lassettre, Todd William Mummert, Mukund Raghavachari, Lance Warren Russell, Maheswaran Surendra, Noshir Cavas Wadia, Peng Ye
  • Patent number: 6743686
    Abstract: A process for making abrupt, e.g. <20 nm/decade, PN junctions and haloes in, e.g., CMOSFETs having gate lengths of, e.g. <50 nm, uses a mask, e.g., sidewall spacers, during ion implantation of gate, source, and drain regions. The mask is removed after source-drain activation by annealing and source and drain extension regions are then implanted. Then the extension regions are activated. Thereafter halo regions are implanted and activated preferably using spike annealing to prevent their diffusion. The process can also be used to make diodes, bipolar transistors, etc. The activation annealing steps can be combined into a single step near the end of the process.
    Type: Grant
    Filed: June 14, 2002
    Date of Patent: June 1, 2004
    Assignee: International Business Machines Corporation
    Inventors: Kam Leung Lee, Ying Zhang, Maheswaran Surendra, Edmund M. Sikorski
  • Patent number: 6732908
    Abstract: A microjoint interconnect structure comprising a dense array of metallic studs of precisely controllable height tipped with a joining metallurgy. The array is produced on a device chip that is to be attached to a carrier, or to a carrier along with other devices, some of which may be selected to have similar interconnect structures so as to form all together an assembled carrier that functions as a complete computing, communications or networking system.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: May 11, 2004
    Assignee: International Business Machines Corporation
    Inventors: Bruce Kenneth Furman, Maheswaran Surendra, Sherif A. Goma, Simon M. Karecki, John Harold Magerlein, Kevin Shawn Petrarca, Sampath Purushothaman, Carlos Juan Sambucetti, Richard Paul Volant, George Frederick Walker
  • Patent number: 6678569
    Abstract: A method and structure for controlling a manufacturing tool includes measuring different manufacturing parameters of the tool, transforming a plurality of time series of the manufacturing parameters into intermediate variables based on restrictions and historical reference statistics, generating a surrogate variable based on the intermediate variables, if the surrogate variable exceeds a predetermined limit, identifying a first intermediate variable, of the intermediate variables, that caused the surrogate variable to exceed the predetermined limit and identifying a first manufacturing parameter associated with the first intermediate variable, and inhibiting further operation of the tool until the first manufacturing parameter has been modified to bring the surrogate value within the predetermined limit.
    Type: Grant
    Filed: November 6, 2001
    Date of Patent: January 13, 2004
    Assignee: International Business Machines Corporation
    Inventors: Raymond J. Bunkofske, John Z. Colt, Jr., James J McGill, Nancy T. Pascoe, Maheswaran Surendra, Marc A. Taubenblatt, Asif Ghias
  • Publication number: 20030136814
    Abstract: A microjoint interconnect structure comprising a dense array of metallic studs of precisely controllable height tipped with a joining metallurgy. The array is produced on a device chip that is to be attached to a carrier, or to a carrier along with other devices, some of which may be selected to have similar interconnect structures so as to form all together an assembled carrier that functions as a complete computing, communications or networking system.
    Type: Application
    Filed: January 18, 2002
    Publication date: July 24, 2003
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Bruce Kenneth Furman, Maheswaran Surendra, Sherif A. Goma, Simon M. Karecki, John Harold Magerlein, Kevin Shawn Petrarca, Sampath Purushothaman, Carlos Juan Sambucetti, Richard Paul Volant, George Frederick Walker, Anna Karecki
  • Patent number: 6584368
    Abstract: A method and structure for controlling a manufacturing tool includes measuring different manufacturing parameters of the tool, transforming a plurality of time series of the manufacturing parameters into intermediate variables based on restrictions and historical reference statistics, generating a surrogate variable based on the intermediate variables, if the surrogate variable exceeds a predetermined limit, identifying a first intermediate variable, of the intermediate variables, that caused the surrogate variable to exceed the predetermined limit and identifying a first manufacturing parameter associated with the first intermediate variable, and inhibiting further operation of the tool until the first manufacturing parameter has been modified to bring the surrogate value within the predetermined limit.
    Type: Grant
    Filed: September 17, 2002
    Date of Patent: June 24, 2003
    Assignee: International Business Machines Corporation
    Inventors: Raymond J. Bunkofske, John Z. Colt, Jr., James J. McGill, Nancy T. Pascoe, Maheswaran Surendra, Marc A. Taubenblatt, Asif Ghias
  • Publication number: 20030055523
    Abstract: A method and structure for controlling a manufacturing tool includes measuring different manufacturing parameters of the tool, transforming a plurality of time series of the manufacturing parameters into intermediate variables based on restrictions and historical reference statistics, generating a surrogate variable based on the intermediate variables, if the surrogate variable exceeds a predetermined limit, identifying a first intermediate variable, of the intermediate variables, that caused the surrogate variable to exceed the predetermined limit and identifying a first manufacturing parameter associated with the first intermediate variable, and inhibiting further operation of the tool until the first manufacturing parameter has been modified to bring the surrogate value within the predetermined limit.
    Type: Application
    Filed: September 17, 2002
    Publication date: March 20, 2003
    Inventors: Raymond J. Bunkofske, John Z. Colt, James J. McGill, Nancy T. Pascoe, Maheswaran Surendra, Marc A. Taubenblatt, Asif Ghias
  • Patent number: 6528363
    Abstract: A method of forming a notched gate structure having substantially vertical sidewalls and a sub-0.05 &mgr;m electrical critical dimension is provided. The method includes forming a conductive layer on an insulating layer; forming a mask on the conductive layer so as to at least protect a portion of the conductive layer; anisotropically etching the conductive layer not protected by the mask so as to thin the conductive layer to a predetermined thickness and to form a conductive feature underlying the mask, the conductive feature having substantially vertical sidewalls; forming a passivating layer at least on the substantially vertical sidewalls; and isotropically etching remaining conductive layer not protected by the mask to remove the predetermined thickness thereby exposing a lower portion of said conductive feature not containing the passivating layer, while simultaneously removing notched regions in the lower portion of the conductive feature.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: March 4, 2003
    Assignee: International Business Machines Corporation
    Inventors: Victor Ku, Maheswaran Surendra, Len Tsou, Ying Zhang
  • Patent number: 6521383
    Abstract: A method of preparing an x-ray mask comprising providing a substrate, and applying sequentially to a surface of the substrate i) an etch stop layer resistant to etchant for an x-ray absorber, and ii) an x-ray absorber layer. The method then includes removing a portion of the substrate below the layers to create an active region of the substrate above the removed portion of the substrate and an inactive region over remaining portions of the substrate, applying a resist layer above the absorber layer, and exposing a portion of the resist layer using electron beam irradiation and developing the resist layer to form a latent mask image over the active region of the substrate.
    Type: Grant
    Filed: October 17, 2001
    Date of Patent: February 18, 2003
    Assignee: International Business Machines Corporation
    Inventors: Maheswaran Surendra, Douglas E. Benoit, Cameron J. Brooks
  • Patent number: 6518136
    Abstract: A process for making abrupt, e.g. <20 nm/decade, PN junctions and haloes in, e.g., CMOSFETs having gate lengths of, e.g. <50 nm, uses a mask, e.g., sidewall spacers, during ion implantation of gate, source, and drain regions. The mask is removed after source-drain activation by annealing and source and drain extension regions are then implanted. Then the extension regions are activated. Thereafter halo regions are implanted and activated preferably using spike annealing to prevent their diffusion. The process can also be used to make diodes, bipolar transistors, etc. The activation annealing steps can be combined into a single step near the end of the process.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: February 11, 2003
    Assignee: International Business Machines Corporation
    Inventors: Kam Leung Lee, Ying Zhang, Maheswaran Surendra, Edmund M. Sikorski
  • Publication number: 20030017711
    Abstract: The invention relates generally to lithographic patterning of very small features. In particular, the invention relates generally to patterning of semiconductor circuit features smaller than lithographically defined using either conventional optical lithography or next generation lithography techniques. The invention relates more particularly, but not by way of limitation, to lateral trimming of photoresist images.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 23, 2003
    Applicant: International Business Machines Corporation
    Inventors: Arpan P. Mahorowala, Maheswaran Surendra, Jung H. Yoon, Ying Zhang
  • Publication number: 20020164546
    Abstract: A method of fabricating an electronic chip on a wafer in which a first mask at a predetermined lower resolution is developed on the wafer and then etched under a first set of conditions for a predetermined period to achieve a mask that is below the resolution limit of current lithography. The etched mask is then used as a hard mask for etching material on a lower layer.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 7, 2002
    Applicant: International Business Machines Corporation
    Inventors: Jeffrey J. Brown, Sadanand Vinayak Deshpande, David V. Horak, Maheswaran Surendra, Len Y. Tsou, Qingyun Yang, Chienfan Yu, Ying Zhang
  • Publication number: 20020151145
    Abstract: A process for making abrupt, e.g. <20 nm/decade, PN junctions and haloes in, e.g., CMOSFETs having gate lengths of, e.g. <50 nm, uses a mask, e.g., sidewall spacers, during ion implantation of gate, source, and drain regions. The mask is removed after source-drain activation by annealing and source and drain extension regions are then implanted. Then the extension regions are activated. Thereafter halo regions are implanted and activated preferably using spike annealing to prevent their diffusion. The process can also be used to make diodes, bipolar transistors, etc. The activation annealing steps can be combined into a single step near the end of the process.
    Type: Application
    Filed: June 14, 2002
    Publication date: October 17, 2002
    Applicant: Reel/Frame
    Inventors: Kam Leung Lee, Ying Zhang, Maheswaran Surendra, Edmund M. Sikorski